Here is the original item:
Paulie is a daredevil
(A) who enjoys skydiving,
motorcycle racing, and boxing. But
(B) will
not eat raw cookie dough
(C) because he is
afraid of bacteria from uncooked eggs.
You wanted to do this:
Paulie is a daredevil. Who enjoys skydiving,
motorcycle racing, and boxing. But will not eat raw cookie dough because
he is afraid of bacteria from uncooked eggs.
Adding a period after daredevil is an error. Who enjoys skydiving ... is a subordinate clause, which cannot stand alone as a complete sentence.
You might want to review the rules.